I have a passthrough dongle so I can charge my iPhone in the car and use an aux audio patch cable, and it's quite a large thing, certainly not unobtrusive but if you're charging maybe that doesn't really matter.

Something like https://www.belkin.com/p/3.5mm-audio-plus-usb-c-charge-adapt...

https://www.amazon.com/UGREEN-Magnetic-Adapter-Charger-Charg... is pretty compact.